بدون تحميل أهم 100 سؤال فى مادة الفيزياء لغات - الجزء الأول

أهم 100 سؤال فى مادة الفيزياء لغات - الجزء الأول



First; Definitions of the scientific concepts

A-

1) The distance of an object at any instant from its rest equilibrium position

The displacement.


2) The distance between two points on the vibrating body's path,
where its velocity is maximum at one point and at the other is zero.

Amplitude of the vib.body


3) Motion of the vibrating body through an interval of time when,
it passed by a fixed point along the path of its motion two successive
times in the same direction and same displacement.

The Complete vibration


4) The time taken by a vibrating body to make one complete vibration.

The Periodic time


5) The number of complete vibrations made by the vibrating body during time period of one second


Frequency of the wave 

B-what is meant by each of the following;


1. The wavelength of a wave =1.2m?

The distance between any two successive points having the same phase=1.2m.

2. The wavelength of a sound wave =2m.

The distance between centers of two successive compressions or two successive rarefactions = 2 m.

3. The wavelength of a transverse wave = 20 cm.

The distance between two successive crests or two successive troughs =20 cm.

4. The distance between successive crest and trough in a transverse wave= 250Cm.

The wavelength of the transverse wave =2x250= 500 Cm.

5. The distance between the first crest and the third crest = 15 Cm.

The wavelength of the transverse wave

6. The distance between the first and the fifth crests to in a trans¬verse wave =24 cm…………………………………………………

The wavelength of the transverse wave

7. The frequency of a vibrating body = 512 Hz…………………………...

The number of complete vibrations made by the vibrating body
during time period of one second or the number of waves passing through a
certain point in the path of the wave in one second =512 Vibration.